Added voltha-infra chart
Added voltha-stack chart
Moved "defaults" values to "global" so that they can be managed by the
macro charts
Added examples for different workflows

Change-Id: I5fb2bfa54a1be725892445e93bd8a35d608e5d14
diff --git a/bbsim-sadis-server/templates/deployment.yaml b/bbsim-sadis-server/templates/deployment.yaml
index b879c9c..69ef00b 100644
--- a/bbsim-sadis-server/templates/deployment.yaml
+++ b/bbsim-sadis-server/templates/deployment.yaml
@@ -43,8 +43,8 @@
           imagePullPolicy: {{ tpl .Values.images.bbsim_sadis_server.pullPolicy . | quote }}
           command: [ "/app/bbsim-sadis-server" ]
           args:
-            - "-log_level={{.Values.defaults.log_level}}"
-            - "-log_format={{.Values.defaults.log_format}}"
+            - "-log_level={{.Values.global.log_level}}"
+            - "-log_format={{.Values.global.log_format}}"
             - "-bbsim_sadis_port={{.Values.bbsim_sadis_port}}"
           volumeMounts:
             - name: kube-config-volume